The experiment was conducted at agronomy farm of Sher-e-Bangla Agricultural University, Dhaka <span style="font-family:Verdana;">from</span><span style="font-family:;" "="&...The experiment was conducted at agronomy farm of Sher-e-Bangla Agricultural University, Dhaka <span style="font-family:Verdana;">from</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> November 2017 to April 2018 to investigate the influence of weeding regimes on the performance of white maize varieties. The experiment comprised two varieties </span><i><span style="font-family:Verdana;">viz</span></i><span style="font-family:Verdana;">. YANGNUO-3000 and PSC-121, designated as V</span><sub><span style="font-family:Verdana;">1</span></sub><span style="font-family:Verdana;"> and V</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> respectively combined with four weed control treatments </span><i><span style="font-family:Verdana;">viz.</span></i><span style="font-family:Verdana;"> T</span><sub><span style="font-family:Verdana;">0</span></sub><span style="font-family:Verdana;"> = No weeding, T</span><sub><span style="font-family:Verdana;">1</span></sub></span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">= One hand weeding at 60 DAS</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">(days after sowing), T</span><sub><span style="font-family:Verdana;">2</span></sub></span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">= two hand weeding at 40 DAS and 60 DAS and T</span><sub><span style="font-family:Verdana;">3</span></sub></span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">= Weed free after 40 DAS. The experiment was laid out in RCBD (factorial) with three replications. PSC-121 showed the superior performance in terms of plant height, leaf number plant</span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:Verdana;">, number of grains cob</span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:Verdana;"> (468.75), 100 grains weight (35.0837 g), grain yield (8.28 t ha</span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:Verdana;">), stover yield (6.56 t ha</span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:Verdana;">) and harvest index (55.58%) over YANGNUO-3000. In </span><span style="font-family:Verdana;">the </span><span style="font-family:Verdana;">case of weed control treatments, the highest plant height, leaf number plant</span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:Verdana;">, number of grains cob</span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:Verdana;"> (464.54), 100 grains weight (37 g), grain yield (9.25 t ha</span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:Verdana;">) and stover yield (7.46 t ha</span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:;" "=""><span style="font-family:Verdana;">) were reported from T</span><sub><span style="font-family:Verdana;">3</span></sub><span style="font-family:Verdana;">. All the parameters studied were found lowest with T</span><sub><span style="font-family:Verdana;">0</span></sub><span style="font-family:Verdana;">. However, in terms of interaction, no single interaction was superior </span></span><span style="font-family:Verdana;">to</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> other alternatives. But in most of the cases V</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;">T</span><sub><span style="font-family:Verdana;">3</span></sub><span style="font-family:Verdana;"> showed the highest values regarding the maximum plant height, leaf number plant</span></span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:Verdana;">, number of grains cob</span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:;" "=""><span style="font-family:Verdana;"> (494.97) and 100 grains weight (38 g). V</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;">T</span><sub><span style="font-family:Verdana;">3</span></sub><span style="font-family:Verdana;"> showed the highest grain yield (9.33 t ha</span></span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:;" "=""><span style="font-family:Verdana;">), whereas, V</span><sub><span style="font-family:Verdana;">1</span></sub><span style="font-family:Verdana;">T</span><sub><span style="font-family:Verdana;">0</span></sub><span style="font-family:Verdana;"> showed the lowest grain yield (5.49 t ha</span></span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:Verdana;">). The lowest weed density and weed biomass (12.17 no. m</span><sup><span style="font-family:Verdana;">-2</span></sup><span style="font-family:Verdana;"> and 4.33 g·m</span><sup><span style="font-family:Verdana;">-2</span></sup><span style="font-family:;" "=""><span style="font-family:Verdana;">) was recorded from T</span><sub><span style="font-family:Verdana;">3</span></sub><span style="font-family:Verdana;">. The highest weed control efficiency (94.38%) was also recorded from T</span><sub><span style="font-family:Verdana;">3</span></sub><span style="font-family:Verdana;">. In </span></span><span style="font-family:Verdana;">the </span><span style="font-family:;" "=""><span style="font-family:Verdana;">case of variety V</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> showed better performance in terms of weed density, weed biomass and WCE (46.32%).</span></span>展开更多
文摘The experiment was conducted at agronomy farm of Sher-e-Bangla Agricultural University, Dhaka <span style="font-family:Verdana;">from</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> November 2017 to April 2018 to investigate the influence of weeding regimes on the performance of white maize varieties. The experiment comprised two varieties </span><i><span style="font-family:Verdana;">viz</span></i><span style="font-family:Verdana;">. YANGNUO-3000 and PSC-121, designated as V</span><sub><span style="font-family:Verdana;">1</span></sub><span style="font-family:Verdana;"> and V</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> respectively combined with four weed control treatments </span><i><span style="font-family:Verdana;">viz.</span></i><span style="font-family:Verdana;"> T</span><sub><span style="font-family:Verdana;">0</span></sub><span style="font-family:Verdana;"> = No weeding, T</span><sub><span style="font-family:Verdana;">1</span></sub></span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">= One hand weeding at 60 DAS</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">(days after sowing), T</span><sub><span style="font-family:Verdana;">2</span></sub></span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">= two hand weeding at 40 DAS and 60 DAS and T</span><sub><span style="font-family:Verdana;">3</span></sub></span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">= Weed free after 40 DAS. The experiment was laid out in RCBD (factorial) with three replications. PSC-121 showed the superior performance in terms of plant height, leaf number plant</span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:Verdana;">, number of grains cob</span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:Verdana;"> (468.75), 100 grains weight (35.0837 g), grain yield (8.28 t ha</span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:Verdana;">), stover yield (6.56 t ha</span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:Verdana;">) and harvest index (55.58%) over YANGNUO-3000. In </span><span style="font-family:Verdana;">the </span><span style="font-family:Verdana;">case of weed control treatments, the highest plant height, leaf number plant</span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:Verdana;">, number of grains cob</span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:Verdana;"> (464.54), 100 grains weight (37 g), grain yield (9.25 t ha</span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:Verdana;">) and stover yield (7.46 t ha</span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:;" "=""><span style="font-family:Verdana;">) were reported from T</span><sub><span style="font-family:Verdana;">3</span></sub><span style="font-family:Verdana;">. All the parameters studied were found lowest with T</span><sub><span style="font-family:Verdana;">0</span></sub><span style="font-family:Verdana;">. However, in terms of interaction, no single interaction was superior </span></span><span style="font-family:Verdana;">to</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> other alternatives. But in most of the cases V</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;">T</span><sub><span style="font-family:Verdana;">3</span></sub><span style="font-family:Verdana;"> showed the highest values regarding the maximum plant height, leaf number plant</span></span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:Verdana;">, number of grains cob</span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:;" "=""><span style="font-family:Verdana;"> (494.97) and 100 grains weight (38 g). V</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;">T</span><sub><span style="font-family:Verdana;">3</span></sub><span style="font-family:Verdana;"> showed the highest grain yield (9.33 t ha</span></span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:;" "=""><span style="font-family:Verdana;">), whereas, V</span><sub><span style="font-family:Verdana;">1</span></sub><span style="font-family:Verdana;">T</span><sub><span style="font-family:Verdana;">0</span></sub><span style="font-family:Verdana;"> showed the lowest grain yield (5.49 t ha</span></span><sup><span style="font-family:Verdana;">-1</span></sup><span style="font-family:Verdana;">). The lowest weed density and weed biomass (12.17 no. m</span><sup><span style="font-family:Verdana;">-2</span></sup><span style="font-family:Verdana;"> and 4.33 g·m</span><sup><span style="font-family:Verdana;">-2</span></sup><span style="font-family:;" "=""><span style="font-family:Verdana;">) was recorded from T</span><sub><span style="font-family:Verdana;">3</span></sub><span style="font-family:Verdana;">. The highest weed control efficiency (94.38%) was also recorded from T</span><sub><span style="font-family:Verdana;">3</span></sub><span style="font-family:Verdana;">. In </span></span><span style="font-family:Verdana;">the </span><span style="font-family:;" "=""><span style="font-family:Verdana;">case of variety V</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> showed better performance in terms of weed density, weed biomass and WCE (46.32%).</span></span>
